<template>
  <div>
    <el-dialog
      title="员工导入"
      :visible="employeeExcel"
      width="30%"
      @close="$emit('update:employeeExcel', false)"
    >
      <el-row type="flex" justify="center">
        <div class="upload-excel">
          <!-- 原生的 input 用来选择文件 样式不好看 所以通过 class 设置隐藏起来 -->
          <input
            ref="excel-upload-input"
            class="excel-upload-input"
            type="file"
            accept=".xlsx, .xls"
            @change="hChange"
          >
          <div class="drop">
            <i class="el-icon-upload" />
            <el-button type="text" @click="toLead">下载导入模板</el-button>
            <span>将文件拖到此处或
              <el-button type="text" @click="hUploading">点击上传</el-button>
            </span>
          </div>
        </div>
      </el-row>
      <el-row type="flex" justify="end">
        <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
        <el-button size="mini" type="primary" @click="$emit('update:employeeExcel', false)">取消</el-button>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import { getToLead, setUploading } from '@/api/employee'
import FileSaver from 'file-saver'
import { Message } from 'element-ui'
export default {
  props: {
    employeeExcel: {
      type: Boolean,
      required: true
    }
  },
  methods: {
    // 导入
    async toLead() {
      // 导入请求
      const res = await getToLead()
      // console.log(res)
      // 将二进制流转换位表格
      FileSaver.saveAs(res, '员工导入模板.xlsx')
    },
    // 文件上传
    hUploading() {
      // 弹出文件选择框: 模拟 input type=file 的click
      this.$refs['excel-upload-input'].click()
    },
    async hChange(e) {
      // 调用change中的e来获取 文件内容
      const file = e.srcElement.files[0]
      try {
        // console.log(file)
        const data = new FormData()
        // file: file类型
        data.append('file', file) // 将文件参数加入到formData中
        if (!file) return
        // 发请求 上传
        const res = await setUploading(data)
        console.log(res.message)
        // 提示用户
        Message.success(res.message)
        // 成功
        this.$emit('uploadSuccess') // 通知父组件 我上传成功
        this.$emit('update:employeeExcel', false) // 关闭弹层
      } finally {
        // 不管有没有上传文件 都将文件传入路径设置为空
        this.$refs['excel-upload-input'].value = ''
      }
    }
  }
}
</script>

<style scoped lang="scss">
    .upload-excel {
      display: flex;
      justify-content: center;
      margin: 20px;
      width: 360px;
      height: 180px;
      align-items: center;
      color: #697086;
      .excel-upload-input {
        display: none;
        z-index: -9999;
      }
      .btn-upload,
      .drop {
        border: 1px dashed #dcdfe6;
        width: 100%;
        height: 100%;
        text-align: center;
        line-height: 160px;
        border-radius: 8px;
        display: flex;
        flex-direction: column;
        justify-content: center;
      }
      .drop {
        line-height: 40px;
        color: #bbb;
        i {
          font-size: 60px;
          display: block;
          color: #c0c4cc;
        }
      }
    }
</style>
